Cyanex 302: An extractant for Fe<sup>3+</sup> from Chloride Medium

Authors

  • MR Ali Department of Applied Chemistry and Chemical Engineering, Rajshahi University, Rajshahi
  • RK Biswas Department of Applied Chemistry and Chemical Engineering, Rajshahi University, Rajshahi
  • SMA Salam Department of Applied Chemistry and Chemical Engineering, Rajshahi University, Rajshahi
  • A Akhter Bangladesh Council of Scientific and Industrial Research Laboratories, Binodpur Bazar, Rajshahi
  • AK Karmakar Department of Applied Chemistry and Chemical Engineering, Rajshahi University, Rajshahi
  • MH Ullah Department of Applied Chemistry and Chemical Engineering, Rajshahi University, Rajshahi

DOI:

https://doi.org/10.3329/bjsir.v46i4.9583

Keywords:

Extraction equilibrium, Fe3 extraction, Cyanex 302, Chloride medium.

Abstract

The solvent extraction of Fe3+ from aqueous chloride solution by bis-(2,4,4-trimethylpentyl) monothiophosphinic acid (Cyanex 302, H2A2) dissolved in kerosene has been investigated over a wide range of aqueous acidity as a function of phase contact time, concentrations of Fe3+, H+ and Cl- in the aqueous phase, Cyanex 302 concentration in the organic phase and temperature. The equilibration time is 50 min. The distribution ratio is found to be independent on [Fe3+] in the aqueous phase at a constant aqueous acidity and extractant concentration. The H+, extractant and Cl- dependences are -1, 0.5 in low concentration region of extractant and -0.5, respectively; which suggest that extraction occurs via the following two parallel reactions: (i) FeCl3 + 0.5 H2A2(o) FeCl2.A(o) + H+ + Cl-; and (ii) FeCl2 + + 0.5 H2A2(o) -----FeCl2A(o) + H+. Temperature dependence data give ΔH value of 9.95 kJ/ mol. The loading capacity of Cyanex 302 towards Fe3+ is 29.41 g Fe3+/100 g Cyanex 302. The extraction equilibrium constant (Kex) is 10-0.632. Extraction ratio is found to be dependent on diluent used. Stripping of the extracted complex is found to be a difficult task, but may be made effective by a solution containing 6 M H2SO4 and 1 M Na2C2O4.

Keywords: Extraction equilibrium; Fe3+ extraction; Cyanex 302; Chloride medium.

DOI: http://dx.doi.org/10.3329/bjsir.v46i4.9583

BJSIR 2011; 46(4): 407-414

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How to Cite

Ali, M., Biswas, R., Salam, S., Akhter, A., Karmakar, A., & Ullah, M. (2012). Cyanex 302: An extractant for Fe<sup>3+</sup> from Chloride Medium. Bangladesh Journal of Scientific and Industrial Research, 46(4), 407–414. https://doi.org/10.3329/bjsir.v46i4.9583

Issue

Vol. 46 No. 4 (2011)

Section

Articles

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